Boring-machine.



j No. 879,918. PATENTED FEB. 25, 1908.

w. s. SHERMAN.

BORING MACHINE.

APPLIUATION FILED MAR.22,1907.

2 SHEETS-SHEET 1.

PATENTBD FEB. 25, 1908.

W. S. SHERMAN.

BORING MACHINE.

APPLICATION FILED MAR.22,1907.

2 SHEETS-SHEET 2.

WILLIS S. SHERMAN, OF MILWAUKEE, WISCONSIN.

BORING-MACHINE.

Specification of Letters Patent.

Patented Feb. 25, 1908.

Application filed March 22 1907- Serial No. 363.854.

To all whom it may concern:

Be it known that I, VVILLIs S. SHERMAN, residing in Milwaukee, in thecounty of Milwaukee and State of Wisconsin, have invented new and usefulImprovements in Boring- Machines, of which the following is adescription, reference being had to the accompanying drawings, which area part of this specification.

This invention has for its object to provide a boring machine especiallyadapted for use in boring nail holes in the side faces of flooring, butcapable of other applications.

Another object of this invention is to provide a boring machine of sucha construction as to be capable of thorough lubrication of all ofitsworking parts in a manner that will not require the frequent attentionof the operator.

Another object of the invention is to improve upon the construction andarrangement of the driving mechanism for boring machines of thischaracter.

Another object of this invention is to provide means independent of thedriving belt for holding the drill head against the work yieldingly andwith pressure and for con-' veniently adjusting the position of thedrill head when not engaged by the work.

Another object of the invention is to improve upon details ofconstruction of the drill head for rendering its parts more durable andefiicient in operation and less liable to wear and become out of order.

IVith the above and other objects in view the invention consists in theboring machine herein claimed, its parts and combinations of parts andall equivalents.

Referring to the accompanying drawings in which like characters ofreference indicate the same parts in the several views; Figure 1 is acentral sectional view of a boring machine constructed in accordancewith this invention; Fig. 2 is an end elevation of the drill head withparts broken away and sectioned for clearness of illustration; and, Fig.3 is an end elevation of the trunnion connection between the casing andthe base.

In these drawings 5 represents a base which is adjustably mounted on asupporting bracket 6 adapted for connection to any suitable support,such as a matching machine for making flooring, there being a guide rib7 on the face of the bracket riding in a corresponding groove in thebottom of the base and bolts 8 clamping the base to the bracket in sucha manner as to permit of its adjustment thereon by reason of said boltspassing through elongated slots 9 of the bracket.

At one end the base 5 is provided with a pair of upwardly extending ears10 forming trunnion bearings for an angular tubular casing 11, thecasing being provided with laterally extending bosses 12 on oppositesides of its elbow portion into which are threaded trunnion screws 13loosely passing through the trunnion bearings 10. In this manner thecasing 11 is free to swing upon its trunnion bearings and is limited inso doing and given a tendency to remain in one position with pressure bymeans of an adjustable spring actuated stop therebeneath. A lug 14projects downwardly from the elbow portion of the casing and has abushing 15 adjustably threaded therein to strike against a lug or web 16extending up from the base between the two trunnion bearings. A bolt 17passes through the bushing 15 and an opening in the web 16 with a coilspring 18 mounted thereon and bearing on theweb opposite the bushing 15and on a collar 19 of the bolt. When the angular casing is swungdownwardly on its trunnions the lug 14 is moved away from the web 16causing the spring 18 to be compressed by the bolt, said spring exertingits pressure in such a way as to tend to restore the casing to itsnormal position with the bushing engaging the web 16. The compression ofthe spring may be adjusted by tightening the nut on bolt 17.

The lower tubular member of the angular casing 11 has a drive shaft 20journaled therethrough, there being a bushing 21 surrounding the shaftand tightly fitting in the elbow portion of the casing and a bushing 22fitting in the other end of this member of the casing where the bore isconsiderably larger. The bushing 22 is held in place by a set screw 23and has a sleeve portion 24 out of contact with the shaft 20 and servingto space the enlarged portion of the bushing which is held by the setscrew from a bearing flange 25 which serves as a thrust bearing for abeveled pinion 26 locked to the shaft 20 by a set screw 27 and confinedbetween-the bearing flange 25 and the end of bushing 21. The bearingflange 25 fits the bore of the lower member of the casing and anextension 28 of the bushing serves as a guide for a belt pulley 29locked on the drive shaft 20 by a mitting the parts to be easily reachedfor set screw 30. With this construction the shaft 20 with the bushing22 and the pinion 26 may be removed from the casing by loosening the setscrew 23 so that the parts may be accessible for cleaning or repair.

The upper tubular member of the casing 11 receives a removable bushing31 which is held in place by a pair of set screws 32 and which is formedof a pair of semi-cylindrical members confined in place upon the tubularsleeve 33 of a drill head 34 by engaging said drill head at one end andan annular flange 35 on the sleeve at the other end. The sleeve 33 hasan internal tubular bushing 36 tightly fitting therein and receiving aspindle shaft 37 which has a beveled gear 38 fitted on its upper end andbearing on the bushing and a beveled pinion 39 keyed on its lower endand also bearing on the bushing and meshing with the beveled pinion 26of the drive shaft. This construction enables the drill head with theshaft 37 and its pinion and the bushings being readily removed from theupper tubular member of the casing by loosening the set screws 32 anddrawing them therefrom, percleaning or re air.

The bevele gear38 is contained Within a recess of the drill head andconcentric therewith are a pair of rings 40 and 41 set into the face ofthe drill head 34 so as to be held in place by shoulders thereof andforming bearings for a series of radial spindles 42 which passtherethrough and have beveled pinions 43 threaded on their inner endsand meshing with the beveled gear 38. A cover plate 44 is clamped uponthe rings 40 and 41, by means of hollow screws 45 threading into thedrill head, there being annular shoulders on said cover plate fittingagainst said rings, and annular shoulders on the drill head also fittingagainst said rings. The cover plate has an annular flange 46 surroundingthe hub of beveled gear 38 affording a seat or hearing for a hardenedbearing ring 47 which is free to turn thereon and upon which the hubs ofthe pinions 43 bear to take the end thrust of the spindles 42, saidpinions bearing at their opposite ends upon the ring 40. The outer ring41 is beveled on both sides of its outer edge so as to form an angularrim for the drill head adapted to ride in the rabbet beneath the tongueof a strip of flooring 48 which is driven in any desirable manner,preferably by a matching machine to which the present invention isdesigned to be attached. Drills 49 are threaded in the outer ends ofspindles 42 so as to bore into the flooring strips at an angle, as shownin Fig. l, as they are successively brought into engagement therewith bythe turning of the drill head by reason of its engagement with themoving strip of flooring.

The entire apparatus is supplied with lubricant from a grease cup 50which is threaded to the center of the cover plate 44, the lubricanttherefrom passing into the gearing nular groove 60 on the outside ring47 into' passageways 61 leading through the pinions 43 and the spindles42 to grooves 62 in the rings 40 from which it passes into the spacebetween rings 40 and 41 so as to lubricate the outer bearings of thespindles. The lubricant also finds its way through a central bore 520fshaft 37 to the interior of the elbow portion of the casing 11 wherepinions 26 and 39 and their bearings are lubricated. From the passageway52 of the shaft 37 are laterally extending ports 53 passing through saidshaft and coming into register with passageways 54 through thesurrounding bushing 36 and the sleeve member 33 of the drill head to alongitudinal groove 55 on the inner surface of the bushing 31 tofacilitate the free turning of the drill head. The shaft 37 receiveslubricant around it not only from the ports 53, but through alongitudinal groove 56 on the interior of bushing 36 which receiveslubricant from the gear chamber of the drill head and conveys it to thethrust bearing of pinion 39. It will be understood that the casing isfilled with lubricant in those parts containing gearing so thatlubricant will find its way past the pinion 26 through a groove 57 ofthe bearing flange 25 to the interior of the loose sleeve 24 and thenthrough a groove 58 to the bearing in bushing 22 for the drive shaft 20.Lubricant also finds its way past pinion 26 through a groove 59 ofbushing 21 so as to lubricate its bearing for the drive shaft.

From the foregoingit will be understood that in operation the drivingshaft 20 is driven by means of a belt on its drive pulley 29 in anydesirable manner and in rotating it causes the beveled pinion 26 thereonto drive the spindle shaft 37 by meshing with its beveled pinion 39,thus causing the spindles 42 to rotate at a high speed through theconnection of their beveled pinions 43 with the beveled gear 38, so thatwhen the drill head is rotated by the movements of the flooring stripagainst which it bears the drills 49 will be successively brought intoengagement therewith and cut the nail holes as desired.

The drill head is held firmly against-the flooring strip at all times bythe action of spring 18 and when one strip of flooring has passedtherefrom it is limited in its position by the engagement of the bushing15 with the web 16 so as to be in proper position to receive the nextstrip as it is fed thereto from the matching machine. The boring may bedone from above when desired by removing the driving pulley 29 andplacing it on the other end of the drive shaft 20, so

that the strips of flooring may be fed beneath the drill head instead ofabove it as shown.

WVith this invention all of the parts -are readily accessible, the drillmembers 49 being removed and replaced when worn by simply threading themout of the spindles, and it being only necessary to remove the plate 44to expose all of the spindles to view and to replace any parts containedin the drill head. The spindles may beunscrewed from their pinions 43 ifit is desired to replace any of them and by loosening the set screws 32the shaft 37 with its pinion 39 and all of the surrounding parts may bewithdrawn from the casing and dissembled by removing the key from thepinion 39. Similarly the shaft 20 and its parts may be removed from thecasing by loosening the set screw 23 as before mentioned.

By providing the drive shaft separate from and at an angle to thespindle shaft 37 the machine may be belted directly instead ofnecessitating the use of corner pulleys and may be belted from above orbelow and on either side of the machine. This arrangement also permitsof the possibility of a complete and thorough lubrication of alloperating parts without an unnecessary waste of lubricant.

The loose ring 47 is free to turn by the m fluence of the gear 38thereon so as to constantly change the bearing surfaces for the pinions43 and prevent its being worn thereby, the lubricant groove 60 thereofassuring a thorough lubrication of these bearing parts as well asserving to feed the lubricant to the passages 61 from which it isconveyed to the spindle bearings.

What I claim as my invention is 1. A boring machine, comprising apivotally mounted casing, a drive shaft journaled therein, a drill headrotatably mounted in the casing at an angle to the drive shaft, and aspindle shaft for the drill head geared to the drive shaft.

2. A boring machine, comprising a base having trunnion bearings, acasing pivotally mounted in the trunnion bearings, a drill headrotatably mounted in the casing, a spindle shaft for operating thedrills of the drill head, means for turning the spindle shaft, a lug onthe casing, a bushing adjustably threaded therein, a stop on the baseadapted to be engaged by the bushing, a bolt passing through the bushingand an opening of the stop, and a coil spring surrounding the bolt andbearing on the stop to hold the bushing in engagement with the stop.

3. A boring machine, comprising a pivotally mounted casing, a drill headrotatably mounted therein, a spindle shaft for driving the drills of thedrill head, a pinion mounted thereon, a driving shaft journaled in thecasing at an angle to the spindle shaft, a pinion on the driving shaftmeshing with the pinion on the spindle shaft, anda bushing on thedriving shaft removably mounted in the casing for permitting the drivingshaft and its pinion to be withdrawn without interfering with the drillhead and the spindle shaft.

4. A boring machine, comprising a pivotally mounted casing, a drivingshaft journaled therein, a drill head rotatably mounted in the casing atan angle to the driving shaft, a spindle shaft for driving the drills ofthe drill head, intermeshing pinions on the spindle shaft and thedriving shaft, and a bushing surrounding the spindle shaft and removablymounted in the casing, whereby the drill head and the spindle shaft withits pinion may be withdrawn from the casing without interfering with thedriving shaft.

5. In a boring machine, a drill head comprising a rotatably mounted disklike member, a pair of concentric rings mounted thereon, a cover platesecured to the disk like member and clamping the rings therebetween,drill spindles journaled in the rings, drill members on the outer endsof the spindles, pinions on the inner ends of the spindles, and asuitably driven gear meshing with the pinions.

6. In a boring machine, a drill head comprising a rotatably mounted disklike member, a pair of concentric rings mounted thereon, a cover platesecured to the disk like member and clamping the rings therebetween,spindles journaled in the rings, drill members on the outer ends of thespindles, pinions on the inner ends of the spindles, a suitably drivengear meshing with the pinions, and means carried by the cover againstwhich the pinions abut to take the end thrust of the spindles.

7. In a boring machine, a drill head comprising a rotatably mounted disklike member, a pair of concentric rings mounted thereon, a cover platesecured to the disk like member, spindles journaled in the rings, drillmembers on the outer ends of the spindles, pinions on the inner ends ofthe spindles, a suitably driven gear meshing with the pinions, and aring mounted on the cover against which the pinions bear to take up theend thrust of the spindles.

8. A boring machine, comprising a pivotally mounted casing, a drill headmember having a flanged sleeve rotatably mounted in the casing, abushing formed in sections sur rounding the flanged sleeve andreleasably secured inthe casing as a bearing for the sleeve, a bushingvi ithin the sleeve, a spindle shaft passing therethrough, a beveledgear on the end of the spindle shaft, a pair of rings mounted on thehead member, a cover plate secured to the head member and clamping therings therebetween, spindles journaled through the rings, drill memberson the outer ends of the spindles, pinions on the inner ends of thespindles meshing with the beveled gear, a bearing ring on the coverplate engaged by the pinions for taking the end thrust of the spindles,and a lubricant cup secured to the cover plate and discharging into thegear chamber between the cover plate and the head member, there beingopenings in the inner ring to permit the lubricant to pass to the spacebetween the rings for lubricating the spindles, and a longitudinal borethrough the spindle shaft communicating with ports leading through thebushing surrounding said. shaft and through the sleeve of the headmember for lubricating thesaid sleeve, and a groove in the bushingsurrounding the spindle shaft leading from the gear chamber to lubricatethe said spindle shaft, and means for driving the spindle shaft suppliedwith lubricant from the bore of the spindle shaft.

9. A boring machine, comprising a pivotally mounted casing, a drill headrotatably mounted therein, a spindle shaft for driving the drill membersof the drill head, means for lubricating the spindle shaft and the drillhead, a driving shaft journaled in the casing, intermeshing earing onthe driving shaft and the spind e shaft receiving such lubricant, abushing between the driving shaft and the casing at one end providedwith a groove for supplying the lubricant thereto, and another bushingbetween the driving shaft and the casing at the other end having a loosesleeve surrounding the driving shaft with a bearing flange on its end toengage the end of the pinion of the driving shaft and form an end wallfor the lubricant chamber containing the intermeshing gearing, therebeing a groove in the bushing leading from the interior of the sleeveand in the bearing flange to convey lubricant to said bushing.

10. In a boring machine,'a drill head com prising a rotatably mountedhead member, radial spindles carried by the head member, drill memberson the outer ends of the spindles, pinions on the inner ends of thespindles, a suitable driving gear meshing with the pinions, and aloosely mounted ring against which the pinions bear to take up the endthrust of the spindles.

11. In a boring machine, a drill head comprising a rotatably mountedhead member, a cover plate secured to the head member and provided witha flange, radial spindles carried by the head member, drill members onthe outer ends of the spindles, pinions on the inner ends of thespindles, a suitably driven gear meshing with the pinions, and a ringloosely mounted on the flange of the cover forming a bearing for thepinions to take the end thrust of the spindles.

12. In a boring machine, a drill head com prising a rotatably mounteddisk like member, a pair of concentric rings mounted thereon, a coverlate secured to the disk like member and clamping the ringstherebetween, there being an annular flange on the coverplate, spindlesjournaled in the rings, drill members on the outer ends of the spindles,pinions on the inner ends of the spindles, a suitably driven gearmeshing with the pinions, a ring loosely mounted on the flange of thecover plate and forming a bearing for the pinions to take the end thrustof the spindles, and a grease cup for lubricating the gearing and thebearings, there being a groove in the flange for conducting lubricantbetween the loose ring and the flange and a groove on the loose ring forconducting lubricant between the pinions and the loose ring and passagesleading through the pinions and the spindles to grooves in. the innerring by which the inner bearings of the spindles are lubricated andlubricant is conducted to the space between the two rings to lubricatethe outer bearings of the spindles.

13. In a boring machine, a drill head comprising a rotatably mountedhead member, radial spindles carried by the head member, drill memberson the outer ends of the spindles, pinions on theinner ends of thespindles a suitable driving gear meshing with the pinions, and a looselymounted ring against which the pinions bear to take up the end thrust ofthe spindles adapted to receive motion from the driving gear.

14. In a boring machine, a drill head comprising a rotatably mountedhead member, radial spindles carried by the head member, drill memberson the outer ends of the s indles, pinions on the inner ends of the spinles, a suitable driving gear meshing with the pinions, and a looselymounted ring against which the pinions bear to take up the end thrust ofthe spindles, said ring being so positioned with relation to the drivinggear as to receive motion therefrom.

15. In a boring machine, a drill head comprising a rotatably mountedhead member, radial spindles carried by the head member, drill memberson the outer ends of the spin dles, pinions mounted on the spindles, asuitable driving gear meshing with the pinions, and'a ring for takingthe end thrust of the spindles adapted to receive motion from thedriving gear.

16. In a boring machine, a drill head comprising a rotatably mountedhead member, radial spindles carried by the head member, drill memberson the outer endsof the spindles, pinions mounted on the spindles, asuitable driving gear meshing with the pinions, and a loosely mountedring taking the end thrust of the spindles and so positioned withrelation to the driving gear as to receive motion therefrom.

17. In a boring machine, a drill head comprising a rotatably mountedhead member,

radial spindles journaled in the head member, groove in the ring andpassages leading from drill members on the outer ends of the spinthegroove to the bearings of the spindles.- 10

dles, pinions mounted on the spindles, a suit- In testimony whereof, Iaflix my signature, able driving gear meshing with the pinions, a inpresence of two Witnesses. ring for taking the end thrust of thespindles, l WILLIS S. SHERMAN.

a cover for the head member, and means for i Witnesses:

supplying lubricant to the space between the K. S. C. CALDWELL,

cover and the head member, there being a ANNA F. SOHMIDTBAUER.

